National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

68°F

20°C

Humidity 91%
Wind Speed Calm
Barometer 29.73 in (1006.6 mb)
Dewpoint 66°F (19°C)
Visibility 9.00 mi
Last update 17 Jun 5:55 am CDT
Extended Forecast for

3 Miles ENE Ontario WI

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 83. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 62. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 10am. High near 76. North wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 58. North wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 82. West wind 3 to 8 mph.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 62. Southwest wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 84. South wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 90. Southwest wind around 11 mph, with gusts as high as 22 mph.

    High: 90 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 83. Light and variable wind becoming west 5 to 7 mph in the morning.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 62. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers, with thunderstorms also possible after 10am. High near 76. North wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 58. North wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Juneteenth
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 82. West wind 3 to 8 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 62. Southwest wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 84. South wind 6 to 10 mph, with gusts as high as 20 mph.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South wind 10 to 13 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny, with a high near 90. Southwest wind around 11 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 74. South wind 9 to 13 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 90. South wind 11 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 73. South wind 11 to 14 mph, with gusts as high as 24 mph.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Southwest wind around 11 mph, with gusts as high as 21 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Ontario WI
 43.73°N 90.55°W
Last Update:
5:44 am CDT Jun 17, 2025
Forecast Valid:
6am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation